I had settled on scanning my negatives at 2400 dpi because, starting at lower resolutions and working upwards, that was where the grain became noticeable. Any higher resolution, I reasoned, would only make the grains larger and not reveal any more detail. I was wrong.
There seems to be an 'interaction' between the scan resolution and the grain size when the two are close which actually produces a more pronounced appearance of graininess. At higher resolutions, though the grain is still visible, it is less distracting. Here are some examples:
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| 2400 dpi |
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| 3200 dpi |
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| 4800 dpi |
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| 6400 dpi |
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| 9600 dpi |
Surprisingly, the least grainy in appearance is the last scan at 9600 dpi (which is a shame since it takes between 7 and 8 minutes per negative at this resolution). So it looks like I'll just have to learn to be patient.
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